CN113993768A

CN113993768A - Working vehicle

Info

Publication number: CN113993768A
Application number: CN202080043793.9A
Authority: CN
Inventors: 菊元美纱子; 西野邦彦; 森冈保光; 永崎英章; 宫下隼辅; 反甫透
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2019-09-26
Filing date: 2020-06-09
Publication date: 2022-01-28
Anticipated expiration: 2040-06-09
Also published as: EP4035517A4; WO2021059610A1; JP7293071B2; EP4035517A1; CN113993768B; US20220104423A1; JP2021048827A

Abstract

Automatic steering during reverse can be easily performed. A work vehicle (1) is provided with: a vehicle body (3), wherein the vehicle body (3) can travel by either manual steering by a steering wheel (30) or automatic steering by the steering wheel (30); a reference registration unit (150) that registers a travel reference line (L1) on the basis of the position of a vehicle body (3) that travels by manual steering; an automatic steering control unit (200) that controls automatic steering on a line to travel (L2) set on the basis of a travel reference line (L1); a display device (45), the display device (45) displaying information related to automatic steering when the automatic steering is forward; and a notification device (95, 96) that notifies information relating to the automatic steering separately from the display device (45) when the automatic steering is reverse.

Description

Working vehicle

Technical Field

The present invention relates to a work vehicle such as a tractor.

Background

Patent document 1 is known as an agricultural machine. The agricultural machine of patent document 1 includes: a traveling machine body that freely switches between manual traveling by manual steering and automatic traveling by automatic steering along a set traveling line set in parallel with a traveling reference line; and a changeover switch that freely switches between manual travel and automatic travel. Further, the agricultural machine sets the start point of the travel reference line after pressing the right instruction button during travel along the ridge, and sets the end point of the travel reference line by pressing the left instruction button during travel. That is, the travel reference line is set before the automatic steering.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2017-123803 "

Disclosure of Invention

Problems to be solved by the invention

In the agricultural machine disclosed in patent document 1, automatic travel can be easily performed by switching from manual travel to automatic travel using a switch. In an agricultural machine, automatic travel while backing is not considered in actual circumstances. In particular, it is difficult for the driver to confirm the items (information) related to the automatic traveling during the backward traveling.

In view of the above problems, it is an object of the present invention to provide a work vehicle capable of easily performing automatic steering during backward traveling.

Means for solving the problems

The technical solution of the present invention for solving the technical problem is characterized as follows.

The work vehicle is provided with: a vehicle body that can travel by either of manual steering by a steering wheel and automatic steering by the steering wheel; a reference registration unit that registers a travel reference line based on a position of a vehicle body that travels by the manual steering; an automatic steering control unit that controls the automatic steering on a travel target line set based on the travel reference line; a display device that displays information related to the automatic steering when the automatic steering is forward; and a notification device that notifies information relating to the automatic steering separately from the display device when the automatic steering is reverse.

The work vehicle is provided with a steering changeover switch for changing over the start or end of the automatic steering, the display device displays a guidance screen for adjusting the start condition of the automatic steering when the automatic steering is forward after the automatic steering is ended, and the notification device notifies whether the start condition of the automatic steering is ready or not by sound or light when the automatic steering is backward.

The display device displays a state in which the start condition of the automatic steering is ready on the guide screen according to a difference between the orientation of the travel reference line and the orientation of the vehicle body.

The notification device notifies whether or not the automatic steering start condition is fulfilled by changing the sound or the light pattern, based on a difference between the direction of the travel reference line and the direction of the vehicle body.

The display device displays at least a screen different from a guidance screen when the automatic steering is backward.

The display device displays a screen urging observation of the rear when the automatic steering is reverse.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, automatic steering during reverse can be easily performed.

Drawings

Fig. 1 is a diagram showing a structure and a control block diagram of a tractor.

Fig. 2 is an explanatory diagram illustrating automatic steering.

Fig. 3 is an explanatory diagram for explaining an operation of the automatic steering.

Fig. 4 is a diagram showing an example of the driving screen M1, the guide screen M2, and the setting screen M3.

Fig. 5 is a diagram showing an example of the turn guidance screen M2a and the pitch guidance screen M2 b.

Fig. 6A is a schematic diagram simply showing a case from the straight running to the turning running J1.

Fig. 6B is a diagram showing a state in which the heading (vehicle body heading) F1 in the traveling direction is different from the heading (line heading) F2 of the travel reference line L1.

Fig. 7A is a diagram showing an example of the turn guide screen M2a in a case where the bearing differences Δ F3 match.

Fig. 7B is a diagram showing an example of the turn guide screen M2a in the case where the bearing difference Δ F3 is different.

Fig. 7C is a diagram showing an example of the turn guidance screen M2a in the case where the bearing difference Δ F3 is within the threshold value after the turn.

Fig. 8 is a diagram showing an example of the main setting screen M3 a.

Fig. 9 is a diagram showing a state of switching from the main setting screen M3a to the detailed setting screen M3 b.

Fig. 10A is a diagram showing an example of the detailed setting screen M3b 1.

Fig. 10B is a diagram showing an example of the detailed setting screen M3B 2.

Fig. 10C is a diagram showing an example of the detailed setting screen M3b 3.

Fig. 11 is a diagram showing a flow of an operation based on an operation of an input button.

Fig. 12 is a diagram showing a travel locus of a tractor in which a start point and an end point of automatic steering are set.

Fig. 13 is a diagram showing a flow of changing the adjacent width L10 by the change operation member.

Fig. 14 is a diagram showing a flow of automatically changing the adjacent width L10.

Fig. 15A is a diagram showing line space assistance in the case where the adjacent width L10 is not changed.

Fig. 15B is a diagram showing line space assistance in the case where the adjacent width L10 is changed.

Fig. 16 is a diagram showing an operation of the notification device.

Fig. 17 is a view showing the periphery of the driver's seat.

Fig. 18 is an overall view of the tractor.

Detailed Description

Hereinafter, embodiments of the present invention will be described based on the drawings.

Fig. 18 is a side view showing an embodiment of the work vehicle 1, and fig. 18 is a plan view showing an embodiment of the work vehicle 1. In the case of the present embodiment, the work vehicle 1 is a tractor. However, the work vehicle 1 is not limited to a tractor, and may be an agricultural machine (agricultural vehicle) such as a combine harvester or a transplanter, or a construction machine (construction vehicle) such as a loader.

Fig. 18 is a side view showing work vehicle 1. The tractor (work vehicle) 1 will be described with reference to fig. 18 and the like. Hereinafter, the front side of the driver seated in the operator's seat 10 of the tractor (work vehicle) 1 is referred to as the front, the rear side of the driver is referred to as the rear, the left side of the driver is referred to as the left, and the right side of the driver is referred to as the right. A horizontal direction perpendicular to the front-rear direction of work vehicle 1 will be described as a vehicle width direction.

As shown in fig. 18, a tractor 1 includes a vehicle body 3, a power machine 4, and a transmission 5. The vehicle body 3 has a traveling device 7 and can travel. The running device 7 is a device having front wheels 7F and rear wheels 7R. The front wheels 7F may be either wheeled or tracked. The rear wheel 7R may be a wheel type or a crawler type.

The power machine 4 is a diesel engine, an electric motor, or the like, and is constituted by a diesel engine in the present embodiment. The transmission 5 can switch the propulsion force of the traveling device 7 by shifting, and can switch the forward and reverse of the traveling device 7. The vehicle body 3 is provided with a driver seat 10.

Further, a coupling portion 8 formed of a three-point link mechanism or the like is provided at the rear portion of the vehicle body 3. The work device 2 is detachably attached to the connection portion 8. By coupling the working device 2 to the coupling portion 8, the working device 2 can be pulled by the vehicle body 3. The working device 2 is a tilling device for tilling, a fertilizer spreading device for spreading fertilizer, a pesticide spreading device for spreading pesticide, a harvesting device for harvesting grass and the like, a ridging device for forming ridges, and the like, and is a device for performing work (ground-to-ground work) on the ground of a field or the like.

As shown in fig. 1, the transmission 5 includes a main shaft (propeller shaft) 5a, a main transmission unit 5b, a sub-transmission unit 5c, a shuttle unit 5d, a PTO power transmission unit 5e, and a front transmission unit 5 f. The propeller shaft 5a is rotatably supported by a housing (transmission case) of the transmission 5, and power from a crankshaft of the power machine 4 is transmitted to the propeller shaft 5 a. The main transmission unit 5b includes a plurality of gears and a shifter for changing the connection of the gears. The main transmission portion 5b changes the rotation input from the propeller shaft 5a and outputs (shifts) the rotation by appropriately changing the connection (engagement) of the plurality of gears by the shifter.

The sub-transmission unit 5c includes a plurality of gears and a shifter for changing the connection of the gears, as in the main transmission unit 5 b. The sub-transmission section 5c changes the rotation input from the main transmission section 5b and outputs (shifts) the rotation by appropriately changing the connection (engagement) of a plurality of gears by a shifter.

The shuttle unit 5d includes a shuttle shaft 12 and a forward/backward switching unit 13. The power output from the sub-transmission portion 5c is transmitted to the shuttle shaft 12 via gears and the like. The forward/reverse switching unit 13 is constituted by, for example, a hydraulic clutch, and switches the rotation direction of the shuttle shaft 12, that is, the forward and reverse of the tractor 1, by turning on/off the hydraulic clutch. The shuttle shaft 12 is connected to a rear wheel differential 20R. The rear wheel differential device 20R rotatably supports a rear axle 21R to which the rear wheel 7R is attached.

The PTO power transmission portion 5e has a PTO propeller shaft 14 and a PTO clutch 15. The PTO propulsion shaft 14 is rotatably supported and can transmit power from the propulsion shaft 5 a. The PTO propeller shaft 14 is connected to the PTO shaft 16 via a gear or the like. The PTO clutch 15 is constituted by, for example, a hydraulic clutch, and switches between a state in which the power of the propeller shaft 5a is transmitted to the PTO propeller shaft 14 and a state in which the power of the propeller shaft 5a is not transmitted to the PTO propeller shaft 14 by turning on and off the hydraulic clutch.

The front transmission portion 5f has a first clutch 17 and a second clutch 18. The first clutch 17 and the second clutch 18 can transmit power from the propeller shaft 5a, and for example, power of the shuttle shaft 12 is transmitted via a gear and a transmission shaft. The power from the first clutch 17 and the second clutch 18 can be transmitted to the front axle 21F via the front propeller shaft 22. Specifically, the front propeller shaft 22 is connected to a front wheel differential device 20F, and the front wheel differential device 20F rotatably supports a front axle 21F to which the front wheels 7F are attached.

The first clutch 17 and the second clutch 18 are constituted by hydraulic clutches or the like. An oil passage is connected to the first clutch 17, and a first operating valve 25 to which the hydraulic oil discharged from the hydraulic pump 33 is supplied is connected to the oil passage. The first clutch 17 is switched between the connected state and the disconnected state by the opening degree of the first operating valve 25. An oil passage is connected to the second clutch 18, and a second work valve 26 is connected to the oil passage. The second clutch 18 is switched between the connected state and the disconnected state by the opening degree of the second operating valve 26. The first and second working valves 25 and 26 are, for example, two-position switching valves with solenoid valves, and are switched to a connected state or a disconnected state by exciting or demagnetizing solenoids of the solenoid valves.

When the first clutch 17 is in the disengaged state and the second clutch 18 is in the engaged state, the power of the shuttle shaft 12 is transmitted to the front wheels 7F via the second clutch 18. Thus, the four-wheel drive (4WD) is achieved in which the front wheels 7F and the rear wheels 7R are driven by power, and the rotational speeds of the front wheels 7F and the rear wheels 7R are substantially the same (4WD constant speed state). On the other hand, when the first clutch 17 is in the engaged state and the second clutch 18 is in the disengaged state, four-wheel drive is performed, and the rotation speed of the front wheels 7F is higher than the rotation speed of the rear wheels 7R (4WD speed-increasing state). When the first clutch 17 and the second clutch 18 are in the disengaged state, the power of the shuttle shaft 12 is not transmitted to the front wheels 7F, and therefore, the rear wheels 7R are driven by the power in two-wheel drive (2 WD).

The tractor 1 is provided with a positioning device 40. The positioning device 40 can detect its own position (positioning information including latitude and longitude) by using a satellite positioning system (positioning satellite) such as D-GPS, GLONASS, beidou, galileo, and QZSS. That is, the positioning device 40 receives satellite signals (the position of the positioning satellite, the transmission time, the correction information, and the like) transmitted from the positioning satellite, and detects the position (for example, latitude and longitude) based on the satellite signals. The positioning device 40 has a signal receiving device 41 and an Inertial Measurement Unit (IMU) 42. The signal receiving device 41 is a device having an antenna or the like and receiving a satellite signal transmitted from a positioning satellite, and is attached to the vehicle body 3 separately from the inertial measurement unit 42. In the present embodiment, the signal receiving device 41 is mounted above the roof of the cab via a support member. The mounting position of the signal receiver 41 is not limited to the embodiment.

The inertial measurement unit 42 includes an acceleration sensor for detecting acceleration, a gyro sensor for detecting angular velocity, and the like. The inertial measurement unit 42 is provided below the vehicle body 3, for example, the driver's seat 10, and is capable of detecting a roll angle, a pitch angle, a yaw angle, and the like of the vehicle body 3.

As shown in fig. 1, the tractor 1 includes a steering device 11. The steering device 11 is a device capable of performing manual steering in which the vehicle body 3 is steered by an operation of a driver and automatic steering in which the vehicle body 3 is automatically steered without depending on the operation of the driver.

The steering device 11 includes a steering wheel (steering wheel) 30 and a steering shaft (rotating shaft) 31 that rotatably supports the steering wheel 30. Further, the steering device 11 has an assist mechanism (power steering device) 32. The assist mechanism 32 assists the rotation of the steering shaft 31 (steering wheel 30) by hydraulic pressure or the like. The assist mechanism 32 includes a hydraulic pump 33, a control valve 34 to which hydraulic oil discharged from the hydraulic pump 33 is supplied, and a steering cylinder 35 that is operated by the control valve 34. The control valve 34 is, for example, a three-position switching valve that can be switched by movement of a spool or the like, and is switched in accordance with the steering direction (rotation direction) of the steering shaft 31. The steering cylinder 35 is connected to an arm (knuckle arm) that changes the orientation of the front wheels 7F.

Therefore, when the driver grips the steering wheel 30 and operates it in one direction or the other direction, the switching position and the opening degree of the control valve 34 are switched in accordance with the rotation direction of the steering wheel 30, and the steering cylinder 35 extends and contracts leftward or rightward in accordance with the switching position and the opening degree of the control valve 34, whereby the steering direction of the front wheels 7F can be changed. That is, the vehicle body 3 can be changed in the traveling direction to the left or right by the manual steering of the steering wheel 30.

As shown in fig. 2, when performing automatic steering, first, a travel reference line L1 is set before performing automatic steering. After the traveling reference line L1 is set, the automatic steering can be performed by setting the line to travel L2 parallel to the traveling reference line L1. In the automatic steering, the traveling direction of the tractor 1 (vehicle body 3) is automatically steered so that the vehicle body position measured by the positioning device 40 coincides with the line to travel L2.

Specifically, before the automatic steering is performed, the tractor 1 (vehicle body 3) is moved to a predetermined position in the field (S1), and when the driver operates the steering changeover switch (registration switch) 52 provided in the tractor 1 at the predetermined position (S2), the vehicle body position detected by the positioning device 40 is set as the starting point P10 of the travel reference line L1 (S3). Further, when the tractor 1 (vehicle body 3) is moved from the starting point P10 of the travel reference line L1 (S4) and the driver operates the steering changeover switch (registration switch) 52 at a predetermined position (S5), the vehicle body position detected by the positioning device 40 is set as the end point P11 of the travel reference line L1 (S6). Therefore, a straight line connecting the start point P10 and the end point P11 is set as the travel reference line L1.

After the traveling reference line L1 is set (after S6), for example, the tractor 1 (vehicle body 3) is moved to a place different from the place where the traveling reference line L1 is set (S7), and when the driver operates the steering changeover switch 52 (S8), a line parallel to the traveling reference line L1, that is, a line to be traveled L2 is set (S9). After the line to travel L2 is set, the automatic steering is started, and the traveling direction of the tractor 1 (vehicle body 3) is changed so as to follow the line to travel L2. For example, when the current vehicle body position is located on the left side with respect to the line L2, the front wheels 7F are steered to the right, and when the current vehicle body position is located on the right side with respect to the line L2, the front wheels 7F are steered to the left. In the automatic steering, the traveling speed (vehicle speed) of the tractor 1 (vehicle body 3) can be changed by manually changing the operation amount of an accelerator (accelerator pedal, accelerator lever) 210 provided in the tractor 1 by a driver or changing the shift stage of the transmission 5 by a shift member (shift lever, shift switch) 211.

Further, after the automatic steering is started, when the driver operates the steering changeover switch 52 at an arbitrary position, the automatic steering can be ended. That is, the end point of the line L2 can be set by the end of the automatic steering based on the operation of the steering changeover switch 52. That is, the length from the start point to the end point of the line L2 may be set to be longer or shorter than the running reference line L1. In other words, the line to travel 2 does not relate to the length of the travel reference line L1, and the line to travel L2 allows the vehicle to travel while automatically steering over a distance longer than the length of the travel reference line L1.

As shown in fig. 1, the steering device 11 has an automatic steering mechanism 37. The automatic steering mechanism 37 is a mechanism that automatically steers the vehicle body 3, and automatically steers the vehicle body 3 based on the position (vehicle body position) of the vehicle body 3 detected by the positioning device 40. The automatic steering mechanism 37 includes a steering motor 38 and a gear mechanism 39. The steering motor 38 is a motor that can control a rotation direction, a rotation speed, a rotation angle, and the like based on the vehicle body position. The gear mechanism 39 includes a gear provided to the steering shaft 31 and rotating together with the steering shaft 31, and a gear provided to the rotating shaft of the steering motor 38 and rotating together with the rotating shaft. When the rotation shaft of the steering motor 38 rotates, the steering shaft 31 automatically rotates (turns) via the gear mechanism 39, and the steering direction of the front wheels 7F can be changed so that the vehicle body position coincides with the line to travel L2.

As shown in fig. 1, the tractor 1 includes a setting switch 51. The setting switch 51 is a switch for switching to at least a setting mode for setting before starting the automatic steering. The setting mode is a mode in which various settings related to automatic steering are performed before the automatic steering is started, and is a mode in which, for example, the start point and the end point of the travel reference line L1 are set.

The setting switch 51 can be switched on or off, and outputs a signal that the setting mode is valid when it is on, and outputs a signal that the setting mode is invalid when it is off. The setting switch 51 outputs a signal for enabling the setting mode to the display device 45 described later when turned on, and outputs a signal for disabling the setting mode to the display device 45 when turned off.

The tractor 1 is provided with a steering changeover switch 52. The steering changeover switch 52 is a switch for switching the start or end of automatic steering. Specifically, the steering changeover switch 52 can be switched up, down, front, and rear from the neutral position, and outputs the start of the automatic steering when the switch is switched down from the neutral position in a state where the setting mode is enabled, and outputs the end of the automatic steering when the switch is switched up from the neutral position in a state where the setting mode is enabled. Further, the steering changeover switch 52 outputs a setting of the starting point P10 of the running reference line L1 when switching from the neutral position to the rear in the state where the setting mode is valid, and outputs a setting of the ending point P11 of the running reference line L1 when switching from the neutral position to the front in the state where the setting mode is valid. That is, the steering changeover switch 52 is used as both a registration switch for setting the start position (start point P10) and the end position (end point P11) of the running reference line L1 and a switch for changing over the start or end of the automatic steering.

As shown in fig. 1, the tractor 1 includes a plurality of control devices 60. The plurality of control devices 60 are devices for controlling the traveling system, the work system, and the vehicle body position in the tractor 1. The plurality of control devices 60 are a first control device 60A, a second control device 60B, and a third control device 60C.

The first control device 60A receives the satellite signals (reception information) received by the signal reception device 41 and the measurement information (acceleration, angular velocity, and the like) measured by the inertia measurement device 42, and obtains the vehicle body position based on the reception information and the measurement information.

The first control device 60A further includes a reference registration unit 150. The reference registration unit 150 is configured by an electric/electronic circuit provided in the first control device 60A, a program stored in a CPU or the like, and the like. As described above, the reference registration unit 150 registers the traveling reference line L1, that is, sets the start point P10 and the end point P11. The reference registering unit 150 sets the vehicle body position to the starting point P10 of the running reference line L1 when the steering changeover switch 52 is operated to the starting point setting side in a state where the tractor 1 is driven by manual steering in the state of being set to the setting mode, and sets the vehicle body position to the end point P11 of the running reference line L1 when the steering changeover switch 52 is operated to the end point setting side.

The second control device 60B has an automatic steering control portion 200. The automatic steering control unit 200 is configured by an electric/electronic circuit provided in the second control device 60B, a program stored in a CPU or the like, and the like. The automatic steering control portion 200 controls the steering motor 38 of the automatic steering mechanism 37 so that the vehicle body 3 travels along the line L2.

As shown in fig. 3, when the steering changeover switch 52 is operated to the start side of the automatic steering, the automatic steering control section 200 performs the automatic steering of the tractor 1 (vehicle body 3) based on the line L2 to be traveled which is parallel to the travel reference line L1. When the deviation between the vehicle body position and the line to travel L2 is smaller than the threshold value, the automatic steering control unit 200 maintains the rotation angle of the rotation shaft of the steering motor 38. When the deviation (positional deviation) between the vehicle body position and the line to run L2 is equal to or greater than the threshold value and the tractor 1 is positioned on the left side with respect to the line to run L2, the automatic steering control portion 200 rotates the rotation shaft of the steering motor 38 so that the steering direction of the tractor 1 becomes the right direction. That is, the automatic steering control unit 200 sets the steering angle in the right direction so that the positional deviation becomes zero. When the deviation between the vehicle body position and the planned travel line L2 is equal to or greater than the threshold value and the tractor 1 is positioned on the right side with respect to the planned travel line L2, the automatic steering control unit 200 rotates the rotation shaft of the steering motor 38 so that the steering direction of the tractor 1 is the left direction. That is, the automatic steering control unit 200 sets the steering angle in the left direction so that the positional deviation becomes zero.

In the above-described embodiment, the steering angle of the steering device 11 is changed based on the deviation between the vehicle body position and the planned travel line L2, but when the orientation of the planned travel line L2 is different from the orientation (vehicle body orientation) F1 of the tractor 1 (vehicle body 3) in the traveling direction (traveling direction), that is, when the angle θ g of the vehicle body orientation F1 with respect to the planned travel line L2 is equal to or greater than the threshold value, the automatic steering control unit 200 may set the steering angle such that the angle θ g becomes zero (the vehicle body orientation F1 coincides with the orientation of the planned travel line L2). The automatic steering control unit 200 may set a final steering angle in the automatic steering based on a steering angle obtained from the deviation (positional deviation) and a steering angle obtained from the azimuth (azimuth deviation). The setting of the steering angle in the automatic steering in the above embodiment is an example, and is not limited. The orientation (vehicle body orientation) F1 of the vehicle body 3 can be obtained by the positioning device 40.

When the accelerator 210 is operated in the case where the automatic steering is performed by the automatic steering control unit 200, the second control device 60B changes the rotation speed of the power machine 4 (power machine rotation speed) according to the amount of operation of the accelerator 210. Further, the second control device 60B changes the shift speed of the transmission 5 when the shift member 211 is operated in the case where the automatic steering is performed by the automatic steering control portion 200.

The third control device 60C raises and lowers the coupling portion 8 in response to an operation of an operation member provided around the driver's seat 10. The first control device 60A, the second control device 60B, and the third control device 60C may be integrated. The control of the traveling system, the control of the work system, and the calculation of the vehicle body position are not limited. As described above, the control device 60 can automatically steer the tractor 1 (vehicle body 3).

As shown in fig. 1, the tractor 1 is provided with a display device 45. The display device 45 is a device capable of displaying various information related to the tractor 1, and is capable of displaying at least driving information of the tractor 1. The display device 45 is disposed in front of the driver seat 10.

The display device 45 includes a control unit (display control unit) 46 and a display unit 47. The control unit 46 performs various controls on the display of the screen of the display device 45. The control unit 46 is constituted by an electric/electronic circuit provided in the display device 45, a program stored in a CPU or the like, and the like. The display unit 47 is constituted by a liquid crystal panel or the like, and displays various kinds of information under the control of the control unit 46. Hereinafter, a case will be described in which the control unit 46 controls the screen or the like of the display device 45.

As shown in fig. 4, when a predetermined operation is performed, the display device 45 (control unit 46) displays a driving screen M1, a guide screen M2, and a plurality of setting screens M3.

The driving screen M1 includes a rotation display unit 62 that displays the rotation speed of the power machine 4 (power machine rotation speed). The rotation display unit 62 includes a level display unit 62a for displaying the engine speed by a display bar or the like, and a numerical display unit 62b for numerically displaying the engine speed. When the setting of the traveling reference line L1 is completed, the driving screen M1 displays a symbol mark 63a indicating that the setting of the starting point P10 of the traveling reference line L1 is completed and a symbol mark 63b indicating that the setting of the ending point P11 of the traveling reference line L1 is completed.

As shown in fig. 5, the guide screen M2 includes a turn guide screen M2a and a pitch guide screen M2 b. As shown in fig. 6A, after the end point P11 of the travel reference line L1 is set or after the automatic steering is completed P12, in order to start the automatic steering, it is necessary to adjust the conditions of the automatic steering after the tractor 1 is turned by a manual operation or the like to travel J1. For example, as shown in fig. 6B, when the tractor 1 is turned and the bearing difference Δ F3, which is the difference between the bearing (vehicle body bearing) F1 in the traveling direction of the tractor 1 and the bearing (line bearing) F2 of the travel reference line L1 (the planned travel line L2) is greatly different before the automatic steering, even if the automatic steering is started, it is difficult to steer the tractor 1 along the planned travel line L2 parallel to the travel reference line L1. The orientation (line orientation) F2 of the travel reference line L1 (the planned travel line L2) may be either a direction extending from one end of the line to the other end thereof or a direction extending from the other end of the line to the one end thereof, in accordance with the extending direction of the line. In other words, the vehicle body orientation F1 coinciding with the line orientation F2 (no orientation difference Δ F3) means a state in which the traveling direction of the tractor 1 coincides with the extending direction of the running reference line L1 (the line to run L2).

Therefore, as shown in fig. 7A to 7C, the turn guidance screen M2a displays the bearing difference Δ F3 as the start condition of the automatic steering. When the bearing difference Δ F3 is displayed to be small on the turn guidance screen M2a, the driver can grasp the conditions for automatic steering.

The turn guide screen M2a will be described with reference to fig. 7A to 7C. In the following description, the current line L2 on which the tractor 1 (vehicle body 3) travels or the line L2 on which the tractor 1 (vehicle body 3) is to be driven immediately before the end of the automatic steering may be referred to as "line L2 b", and the next line L2 may be referred to as "line L2 c" after the end of the next automatic steering.

The turning guidance screen M2a includes a vehicle body direction display unit 64, a vehicle body display unit 65, and a reference direction display unit 66. For convenience of explanation, the vehicle body orientation display unit 64 is shown by a broken line.

The vehicle body orientation display unit 64 is a portion that shows the vehicle body orientation F1, and is indicated by a straight line (a straight line extending vertically on the turn guide screen M2a) on the turn guide screen M2 a. The display position of the vehicle body direction display unit 64 is fixed on the turn guide screen M2a and does not change. The vehicle body display section 65 is a portion that graphically represents the vehicle body 3, and overlaps the vehicle body orientation display section 64. The vehicle body display portion 65 is a polygonal figure including a front end portion 65a having a sharp front end, and the front end portion 65a indicates the front portion of the tractor 1 (the vehicle body 3).

The reference azimuth display unit 66 is a portion indicating the azimuth F2 of the travel reference line L1 (the next line L2) and is indicated by a straight line on the turn guide screen M2 a. As shown in fig. 7A, when the vehicle body orientation F1 matches the line orientation F2, the vehicle body orientation display unit 64 and the reference orientation display unit 66 are displayed in an overlapping manner. Since the vehicle body direction display unit 64 and the reference direction display unit 66 are colored differently, the driver or the like can visually confirm that the vehicle body direction F1 matches the line direction F2.

As shown in fig. 7B, when the orientation difference Δ F3 between the vehicle body orientation F1 and the line orientation F2 becomes large by the turning travel J1 of the tractor 1 (the vehicle body 3), the controller 46 causes the linear reference orientation display unit 66 to change the display position in accordance with the orientation difference Δ F3. Specifically, when the vehicle body display unit 65 is set as the center O1, the reference azimuth display unit 66 rotates as the center O1 of the vehicle body display unit according to the magnitude of the azimuth difference Δ F3. The display device 45 (control unit 46) increases the angle θ 1 between the reference azimuth display unit 66 and the vehicle body display unit 65 as the azimuth difference Δ F3 becomes larger, and decreases the angle θ 1 between the reference azimuth display unit 66 and the vehicle body display unit 65 as the azimuth difference Δ F3 becomes smaller. As shown in fig. 7C, if the next

line display section

68a or 68b overlaps the vehicle body display section 65, the condition for automatic steering is ready. In other words, when the bearing difference Δ F3 is equal to or less than a predetermined value, the automatic steering condition is fulfilled.

Further, the turn guidance screen M2a displays the next

line display units

68a and 68 b. The next line display unit 68b is displayed with the adjacent width changed as described later. The next line display unit 68a is a portion showing at least the next line L2c from the line L2b on which the tractor 1 (vehicle body 3) travels, and shows a straight portion on which the tractor 1 (vehicle body 3) travels straight during automatic steering. The line display unit (straight line unit) 68a is shown on the turn guide screen M2a at a position spaced apart from the vehicle body direction display unit 64 by a predetermined distance.

As shown in fig. 5, the pitch guide screen M2b is a screen for guiding the tractor 1 (vehicle body 3) toward the next line L2c by automatic steering separately from the automatic steering control unit 200 in a state where the automatic steering condition is fulfilled. The pitch guide screen M2b includes a next line display unit 68a and a guide display unit 69 that indicates that the tractor 1 (vehicle body 3) is guided to the next line display unit 68a by automatic steering (pitch assist is performed).

As shown in fig. 8 to 10C, the plurality of setting screens M3 include a main setting screen M3a and a detailed setting screen M3 b. The setting information on the main setting screen M3a and the detailed setting screen M3b is information on the vehicle body 3, that is, information on automatic steering.

As shown in fig. 8, the main setting screen M3a displays setting items 70a to 70h and setting values 71a to 70h as setting information.

The setting item 70a is an item indicating the sensitivity of the automatic steering as a setting value 71a, and the sensitivity can be set to three setting values of sensitivity, normal, and slow. When the set value is set to be sensitive, the steering angle of the automatic steering is larger than the deviation (positional deviation, azimuth deviation) during the automatic steering, when the set value is set to be slow, the steering angle of the automatic steering is smaller than the deviation (positional deviation, azimuth deviation) during the automatic steering, and when the set value is set to be normal, the steering angle of the automatic steering is a value between slow and sensitive with respect to the deviation (positional deviation, azimuth deviation) during the automatic steering. That is, the sensitivity indicates: the degree of response to changes in the steering angle with respect to the deviation (positional deviation, azimuth deviation).

The setting item 70b is an item indicating the turn guidance screen M2a (turn guidance), and indicates whether or not the on/off of the turn guidance screen M2a is the set value 71b after the automatic steering is displayed. When the set value 71b is "on", the turn guidance screen M2a is displayed, and when the set value 71b is "off", the turn guidance screen M2a is not displayed. That is, the set value 71b sets whether or not to perform the turn guidance on the turn guidance screen M2 a. The turn guidance screen M2a is not displayed when the automatic steering is started.

The setting item 70c is an item indicating the line space guide screen M2b (line space assist), and indicates whether or not the on/off of the line space guide screen M2b is displayed at the start of the automatic steering, as the setting value 71 c. When the set value 71c is "on", the line space guide screen M2b is displayed, and when the set value 71c is "off", the line space guide screen M2b is not displayed. That is, the set value 71c sets whether or not the inter-line distance assistance is performed by the automatic steering.

The setting item 70d is an item indicating the number of times of turning (turn count) by manual steering, that is, the number of work pieces that have been automatically steered by the line to travel L2, and the on/off indicating whether or not to calculate the number of work pieces is the setting value 71 d. When the set value 71d is "on", the number of work pieces is calculated, and when the set value 71d is "off", the number of work pieces is not calculated.

The setting item 70e is an item indicating the type of work, and the setting value 71e is a setting value for agricultural work such as tilling, raking, ridge bordering, leakage prevention, and seeding. The setting item 70f is an item indicating the reference adjacent width L11, and the numerical value of the reference adjacent width L11 is a set value for the set value 71 f. The setting item 70g indicates that the adjacent width (adjacent extension width) L12 is changed, and the value for changing the adjacent width L12 is a set value for the set value 71 g. The setting item 70h is an item indicating position correction (GPS position correction), and the value of the position correction is a set value for the set value 71 h.

The detailed setting screen M3b is a screen on which setting (input) of the setting values 71a to 70h is performed and displayed. When a predetermined operation is performed on the main setting screen M3a, the screen is switched from the main setting screen M3a to the detailed setting screen M3b as shown in fig. 9. The detailed setting screen M3b includes a list display unit 72 for displaying a list of the setting items 70a to 70h, and a cursor K10 is displayed on the list display unit 72.

When a predetermined setting item among the plurality of setting items 70a to 70h is selected by the cursor K10, the detailed setting screen M3b is shifted to a screen on which a setting value corresponding to the selected setting item is input. For example, when the setting item 70A indicating the sensitivity is selected on the detailed setting screen M3b as shown in fig. 9, the detailed setting screen M3b shifts to the detailed setting screen M3b1 for changing the sensitivity as shown in fig. 10A. On the detailed setting screen M3b1, three setting values, i.e., sensitive, normal, and slow, are displayed, and the setting value can be changed by selecting a predetermined setting value with the cursor K10.

When the setting item 70f indicating the reference adjacent width L11 is selected on the detailed setting screen M3B shown in fig. 9, the detailed setting screen M3B shifts to the detailed setting screen M3B2 in which the reference adjacent width L11 is changed, as shown in fig. 10B. In the detail setting screen M3b2, the reference input unit 75 for inputting the reference adjacent width L11 is displayed. The reference input unit 75 includes a plurality of bit input units for inputting numerical values for each bit, and includes, for example, a single-bit input unit 75a for inputting a first-bit numerical value, a two-bit input unit 75b for inputting a second-bit numerical value, a three-bit input unit 75c for inputting a third-bit numerical value, and a determination unit 75d for determining a numerical value. In the present embodiment, a bit input unit for inputting three digits is described as the reference input unit 75, but the number of digits is not limited.

When the setting item 70g indicating the changed adjacent width (adjacent extension width) L12 is selected on the detailed setting screen M3b shown in fig. 9, the detailed setting screen M3b shifts to the detailed setting screen M3b3 on which the changed adjacent width L12 is changed, as shown in fig. 10C. On the detailed setting screen M3b3, a change input unit 76 for inputting a change of the adjacent width L12 is displayed. The change input unit 76 is configured by a plurality of bit input units that input numerical values for each bit, and includes, for example, a one-bit input unit 76a that inputs a numerical value of a first bit, a two-bit input unit 76b that inputs a numerical value of a second bit, and a determination unit 76c that determines a numerical value. In the present embodiment, the bit input unit for inputting a two-digit number is described as the change input unit 76, but the number of digits is not limited.

As shown in fig. 1 and 17, the tractor 1 (vehicle body 3) includes an input button 80. The input button 80 is connected to the display device 45 (control unit 46). The input button 80 is, for example, an automatic return type button (push button) that can be turned on/off. The input button 80 can perform screen switching, cursor K10 movement, and setting of setting values on the plurality of setting screens M3 by two operations, i.e., the first operation and the second operation.

As shown in fig. 17, the input button 80 can perform a short press operation with a short press time (press time, on time) T10 as the first operation, and the input button 80 can perform a long press operation with a press time T10 longer than the short press operation as the second operation.

The input button 80 is attached to, for example, a front cover (console cover) 151 provided in front of the driver seat 10. The display device 45, the setting switch 51, the steering changeover switch 52, the correction switch 53, the shuttle lever 91, and the like are also attached to the console cover 151.

The display device 45 (control unit 46) switches the plurality of setting screens M3 when the long press operation is performed, moves the cursor K10 to a predetermined setting item among the plurality of setting items 70a to 70h when the short press operation is performed on the switched setting screen M3, and determines the predetermined setting item when the long press operation is performed when the cursor K10 is positioned in the predetermined setting item.

Specifically, as shown in fig. 8, when the input button 80 is long-pressed on the main setting screen M3a, the main setting screen M3a is switched to the detailed setting screen M3b as shown in fig. 8 and 9. As shown in fig. 9, on the detailed setting screen M3b, each time the input button 80 is pressed for a short time, the position of the cursor K10 changes, and the cursor K10 can be positioned at a predetermined setting item from the plurality of setting items 70a to 70 h.

In fig. 9, if the long-press operation is performed on the input button 80 with the cursor K10 positioned in the setting item 70A indicating the sensitivity, the setting item 70A indicating the sensitivity is determined, and the screen image shifts from the detailed setting screen M3b to the detailed setting screen M3b1 indicating the sensitivity, as shown in fig. 10A.

In fig. 9, if the input button 80 is long-pressed with the cursor K10 positioned in the setting item 70f indicating the reference adjacent width L11, the setting item 70f indicating the reference adjacent width L11 is determined, and the screen image shifts from the detailed setting screen M3B to the detailed setting screen M3B2 for setting sensitivity, as shown in fig. 10B.

In fig. 9, if the input button 80 is long-pressed with the cursor K10 positioned in the setting item 70g indicating the changed adjacent width L12, the setting item 70g indicating the changed adjacent width L12 is determined, and the screen image shifts from the detailed setting screen M3b to the detailed setting screen M3b3 for setting sensitivity, as shown in fig. 10C.

As shown in fig. 10A, the display device 45 moves the cursor K10 to any one of a plurality of setting values (sensitive, normal, and slow) when the short-press operation is performed on the setting screen (the detailed setting screen M3b1) for setting the setting values, and determines a predetermined setting value when the long-press operation is performed when the cursor K10 is at a predetermined setting value. For example, when the long-press operation is performed while the cursor K10 is moved to the sensitive state by the short-press operation, the setting value can be set to the sensitive state.

As shown in fig. 10B and 10C, in the setting screen (the detailed setting screen M3B2, the detailed setting screen M3B3) for setting the setting value, the display device 45 executes movement of the cursor K10 to a predetermined position out of a plurality of digits of the setting value when the short-press operation is performed, executes determination of the predetermined position when the long-press operation is performed when the cursor K10 is positioned at the predetermined position, and changes the numerical value of the predetermined position when the short-press operation is performed after the predetermined position is determined.

As shown in fig. 10B, in the reference input unit 75 of the detailed setting screen M3B2, if the input button 80 is operated by a short press, the cursor K10 can be moved to any one of the one-bit input unit 75a, the two-bit input unit 75B, the three-bit input unit 75c, and the determination unit 75 d. For example, in the three-digit input unit 75c, if the input button 80 is long-pressed, the third digit is determined. After the third digit is determined, each time the input button 80 is operated by a short press, the digits are sequentially incremented by one, and the digit of the third digit can be changed to any one of 0 to 9. In the reference input unit 75, after inputting the numerical value to the one-bit input unit 75a, the two-bit input unit 75b, and the three-bit input unit 75c, the numerical value input to the one-bit input unit 75a, the two-bit input unit 75b, and the three-bit input unit 75c can be set to the reference adjacent width L11 by performing the long-press operation while moving the cursor K10 to the determination unit 75 d.

As shown in fig. 10C, in the change input unit 76 of the detailed setting screen M3b3, if the input button 80 is pressed for a short time, the cursor K10 can be moved to the one-bit input unit 76a, the two-bit input unit 76b, and the determination unit 76C. If the input button 80 is pressed for a long time, the one-bit input portion 76a or the two-bit input portion 76b can be determined. After the one-bit input unit 76a or the two-bit input unit 76b is determined, if the input button 80 is pressed for a short time 80b, the number can be changed to any one of 0 to 9. In the change input unit 76, after the numerical values are input to the one-digit input unit 76a and the two-digit input unit 76, the numerical values input to the one-digit input unit 76a and the two-digit input unit 76b can be set to the change adjacent width L12 by performing the long-press operation while the cursor K10 is moved to the determination unit 76 c.

Fig. 11 is a diagram summarizing the flow of operations based on the operation of the input button 80.

In fig. 11, when the short-press operation is performed on any one of the driving screen M1, the guide screen M2, and the main setting screen M3a (S1) (yes in S2), the driving screen M1, the guide screen M2, and the main setting screen M3a are sequentially switched (S3). When the long press operation is performed instead of the short press operation (S2, no), it is determined whether or not the screen on which the long press operation is performed is the main setting screen M3a (S4). If the setting screen is the main setting screen M3a (yes in S4), the screen is shifted to the detailed setting screen M3b (S5). If the short-press operation is performed on the detailed setting screen M3b (yes at S6), the cursor K10 is moved, that is, the cursor K is moved from the plurality of setting items 70a to 70h to a predetermined setting item (S7). When the short press operation is not performed but the long press operation is performed (no at S6), predetermined setting items are determined and the screen images are shifted to the detailed setting screens M3b1 to M3b3 corresponding to the predetermined setting items (S8). When the screens M3b2 and M3b3 are set in detail (yes in S9), it is determined whether or not the short press operation is performed (S10). If the operation is a short press operation (yes at S10), the cursor K10 is moved to a predetermined position among a plurality of digits (S11). When the operation is not the short press operation but the long press operation (no at S10), a predetermined bit is determined (S12), and when the operation is the short press operation (yes at S13), the value of the predetermined bit is counted up (S14). When the operation is not a short press operation but a long press operation (S13, no), the numerical value of the predetermined bit is determined (S15). When the long press operation is performed in a state where the cursor K10 is moved to the determination unit 75d or the determination unit 76c, the reference adjacent width L11 can be set or the adjacent width L12 can be changed (S16). S11 to S15 can be repeated.

If the detailed setting screen M3b2 or M3b3 is not present, that is, if the detailed setting screen M3b1 is present (no in S9), it is determined whether or not the short press operation is performed (S17). If the operation is the short-press operation (yes in S17), the cursor K10 is moved to a predetermined setting value (sensitivity) among the plurality of setting values (sensitivities) (S19). When the short press operation is not performed but the long press operation is performed (S17, no), a predetermined set value (sensitivity) is determined (S18).

As described above, not only the switching of the plurality of setting screens M3 but also the changing of the setting value can be performed by the short-press operation and the long-press operation of the single input button 80. The input button 80 can switch the plurality of setting screens M3 and can also switch other screens. For example, the driving screen M1 and the guide screen M2 can be switched.

When a work (ground-facing work) is performed in the field H1, the working device 2 corresponding to the work is coupled to the tractor 1, and the tractor 1 to which the working device 2 is coupled travels in the field H1. As shown in fig. 12, for example, when performing a ground aligning operation in a field H1, the operation is performed while repeating straight traveling and turning as indicated by a line L2 to be traveled. That is, the tractor 1 makes a straight line after turning when approaching the ridge side, and makes a straight line after making a turn again when approaching the opposite ridge side. When turning, the working device 2 in the working posture is raised, and the turning portion does not perform work.

In this way, when performing work while repeating a turn, automatic steering is performed at the straight portion SLn (n is 1, 2, 3.) of the planned travel line L2. For example, in the first straight-ahead section SL1, after the driver starts the automatic steering at the start position ST1 (STn: n ═ 1) by operating the steering changeover switch 52, the driver operates the steering changeover switch 52 while observing the working state, thereby ending the automatic steering at the end position EN1 (ENn: n ═ 1). Further, the driver finely adjusts the vehicle body position of the tractor 1 by operating the correction switch 53 in accordance with the situation where the automatic steering is performed in the first straight traveling section SL1, or adjusts the vehicle speed of the tractor 1 by operating the accelerator 210 and the transmission member 211 in accordance with the working situation.

Further, the driver turns the vehicle by manually steering the tractor 1 after finishing the automatic steering at the end position EN1, and starts the automatic steering at the start position ST2 by operating the steering changeover switch 52 in the second straight-ahead portion SL2, and finishes the automatic steering at the end position EN2 by operating the steering changeover switch 52. That is, in the field H1, the tractor 1 travels while performing manual steering in the turning portion RLn connected by the straight portion SLn.

As described above, by operating the steering changeover switch 52 at the start position STn (n 1, 2, 3.) and the end position ENn (n 1, 2, 3.), it is possible to perform work while repeating automatic steering and manual steering.

The travel route setting unit 201 sets the travel route line L2. The travel route setting unit 201 is configured by an electric/electronic circuit provided in the second control device 60B, a program stored in a CPU or the like, and the like. The travel line setting unit 201 may be provided in the first control device 60A and the third control device 60C, but is not limited thereto. The travel line setting unit 201 sets the planned travel line L2 based on the travel reference line L1. That is, the travel line setting unit 201 sets the straight portion SLn parallel to the travel reference line L1 each time the automatic steering is started. The travel line setting unit 201 sets the straight portion SL1 at a position away from the travel reference line L1 by a predetermined distance, for example, when the first automatic steering is started (when n is 1). The adjacent width L10 of the running reference line L1 and the straight section SL1 is set as a reference adjacent width L11. For example, when the second and subsequent automatic steering starts (when n is 2 or more), the travel line setting unit 201 sets the straight portion SLn at a position away from the travel reference line L1 by a predetermined distance (when n is 2 or more).

Here, the running line setting unit 201 can change the adjacent width L10 of the adjacent running lines L2 among the plurality of running lines L2. That is, the travel line setting unit 201 can change the adjacent width L10 between the immediately preceding straight portion SLn-1(n is 2 or more) and the straight portion SLn (n is 2 or more) adjacent to the immediately preceding straight portion SLn-1(n is 2 or more).

As shown in fig. 1, the tractor 1 includes a change operation member 81. The change operation member 81 is a switch that can be switched on/off, and when turned on, instructs to change the adjacent width L10, and when turned off, does not instruct to change the adjacent width L10.

When a change is instructed by the change operation member 81, the travel line setting unit 201 changes the adjacent width L10 when a change instruction is issued. For example, in the case where there is a change command during automatic steering, the travel line setting unit 201 changes the adjacent width L10 between the straight portion SLn-1(n is 2 or more) currently performing automatic steering and the straight portion SLn (n is 2 or more) next to the straight portion SLn. More specifically, the travel line setting unit 201 sets the changed adjacent width L12 and the reference adjacent width L11 as the adjacent width L10(L10 ═ L11+ L12). For example, in a case where there is a change instruction by turning on the change operation member 81 in a situation where the third straight portion SL3 performs automatic running, the running line setting portion 201 sets the adjacent width L10 of the third straight portion SL3 and the next fourth straight portion SL4 in the current automatic steering to L10-L11 + L12 instead of L10-L11. In the next fourth straight section SL4, the adjacent width L10 of the fifth straight section SL5 is returned to the reference adjacent width L11 without a change instruction.

In addition, when the change operation member 81 is operated before the start of the automatic steering in a curve or the like after the end of the automatic steering, the travel line setting unit 201 also sets the adjacent width L10 between the immediately preceding straight-traveling section SLn-1(n is 2 or more) and the immediately following straight-traveling section SLn, on which the automatic travel has been performed, to L10L 11+ L12. In addition, when no change command is issued by the change operation member 81, the travel line setting unit 201 sets the reference adjacent width L11 to the adjacent width L10.

Fig. 13 is a diagram showing a flow of changing the adjacent width L10 by the change operation member 81.

In fig. 13, whether or not there is a change command is determined both during automatic steering and after the automatic steering is completed (S20). When there is a change command (yes at S20), the travel line setting unit 201 changes the value obtained by adding the changed adjacent width L12 to the reference adjacent width L11 to the adjacent width L10 on the next line L2c to be the adjacent width L10 (S21). When there is no change command (yes at S20), the travel line setting unit 201 fixes the adjacent width L10 to the reference adjacent width L11 on the next line L2c without changing the adjacent width L11 (S22). When the job is completed (yes at S23), the travel line setting unit 201 ends the process, and when the job is not completed, the process returns to S20. As shown in fig. 13, the adjacent width L10 of the next line to run L2c may be changed when a change command is issued, and the adjacent width L10 of the next line to run L2c may not be changed when no change command is issued.

The correction switch 53 may also serve as the change operation member 81. The correction switch 53 is a switch for correcting the vehicle body position (positioning position) obtained by the positioning device 40, and is a switch that can swing freely to one side (left side) and the other side (right side). The correction switch 53 is, for example, a switch as follows: when the short-press operation is performed to the left, the correction to shift the positioning position to the right of the vehicle body 3 is performed, and thereby the tractor 1 (the vehicle body 3) is steered to the left during the automatic steering, and when the short-press operation is performed to the right, the correction to shift the positioning position to the left of the vehicle body 3 is performed, and thereby the tractor 1 (the vehicle body 3) is steered to the right during the automatic steering. The change instruction may be given when the correction switch 53 is pressed long to the left or right.

The display device 45 may also serve as the change operation member 81. For example, an adjacent width change icon may be provided on the screen of the display device 45, and a change instruction may be given when the icon is pressed.

In the above embodiment, the adjacent width L10 is changed by manually operating the change operation member 81, but the adjacent width L10 may be automatically changed.

The tractor 1 includes a calculation unit 202. The calculation unit 202 calculates the number of jobs for which the ground-to-ground job is performed (the number of ground-to-ground jobs). For example, since the tractor 1 performs work (ground work) while traveling straight, the total of the number of travel reference lines L1 and the number of straight portions SLn can be regarded as the number of works (number of works) WTi in the field H1. That is, the number of work pieces WTi is equal to the number of travel reference lines L1 + the number of straight portions SLn. Since the travel reference line L1 may be set without performing work, the number of work pieces WTi may be set to the number of straight portions SLn without including the number of travel reference lines L1.

Specifically, the calculation unit 202 sets the number of times of switching to either the start or the end of the automatic steering by the steering switch 52 as the number of work pieces WTi. For example, after the setting of the travel reference line L1 is completed, the calculation unit 202 sets the number of times the start of the automatic steering is selected (the number of times of switching start) in the steering switch 52 as the number of work WTi. In other words, the calculation unit 202 sets the number n of the start positions STn as the number WTi of the work pieces.

Alternatively, after the travel reference line L1 is set, the calculation unit 202 sets the number of times the automatic steering is selected to be ended (the number of times of end switching) in the steering switch 52 as the number of work WTi. In other words, the calculation unit 202 sets the number n of the end positions ETn as the number WTi of the work pieces.

Alternatively, the calculation unit 202 may set the number of times the vehicle body 3 is turned by manual steering (the number of times of switching completion) as the number of work WTi. For example, after setting the travel reference line L1, the arithmetic unit 202 determines whether or not the steering is a manual steering. When determining that the steering is the manual steering, the calculation unit 202 monitors the steering angle of the steering device 11 during the manual steering. Then, when the steering angle of the steering device 11 during manual steering is equal to or greater than the turning threshold (value that can be determined as turning), it is determined that the vehicle body 3 has turned, and the number of turns is counted. In other words, the calculation unit 202 sets the number n of the turning portions RLn on the line L2 as the number WTi of the work pieces.

It should be noted that the number of times of switching start, the number of times of switching end, and the number of times of switching end may be set as the number of work pieces WTi, and may be set on a setting screen of the display device 45. As shown in fig. 7A to 7C, the number of work pieces WTi may be displayed on the number-of-pieces display unit 90 on the turn guidance screen M2 a.

When the number of work pieces WTi calculated by the calculation unit 202 reaches a predetermined number, the travel line setting unit 201 changes the adjacent width L10. Specifically, when the number of work pieces WTi reaches the predetermined number, the travel line setting unit 201 changes the value obtained by adding the changed adjacent width L12 to the reference adjacent width L11 to the adjacent width L10, and when the number of work pieces WTi does not reach the predetermined number, changes the reference adjacent width L11 to the adjacent width L10. For example, when the number of work pieces WTi in the current straight-traveling segment SLn-1(n is 2 or more) in which automatic steering is performed is 10 and the predetermined number of pieces is 10, the adjacent width L10 between the straight-traveling segment SLn-1(n is 2 or more) and the next straight-traveling segment SLn (n is 2 or more) is set to L10-L11 + L12 instead of L10-L11.

In fig. 14, the calculation unit 202 calculates the number WTi of work pieces (S30). It is judged whether or not the number of works WTi reaches a predetermined number (S31). When the number of work pieces WTi reaches the predetermined number (yes in S31), the travel line setting unit 201 changes the value obtained by adding the changed adjacent width L12 to the reference adjacent width L11 in the next scheduled travel line L2c to the adjacent width L10 for the adjacent width L10 (S32). After changing the adjacent width L10, the travel line setting unit 201 resets the number of work pieces WTi (S33). When the number of operations WTi has not reached the predetermined number (no in S31), the travel line setting unit 201 fixes the adjacent width L10 to the reference adjacent width L11 in the next line L2c without changing (S34). When the job is completed (yes at S35), the travel line setting unit 201 ends the process, and when the job is not completed, the process returns to S30. As shown in fig. 14, the adjacent width L10 of the next line to travel L2c can be changed for each number of jobs. The predetermined number of settings can be set on the setting screen of the display device 45.

As shown in fig. 7A to 7C, when the adjacent width L10 is changed, that is, when the adjacent width L12 is changed to be added to the reference adjacent width L11, the next line display unit 68b different from the next line display unit 68a is displayed on the turn guidance screen M2 a. The next line display unit 68a is a straight line portion SLn-1(n is 2 or more) when the adjacent width L10 is the reference adjacent width L11, and the next line display unit 68b is a straight line portion SLn (n is 2 or more) when the adjacent width L10 is the sum of the changed adjacent width L12 and the reference adjacent width L11. Thus, when the next line display unit 68b is displayed on the turn guide screen M2a, the driver can grasp that the next line L2c is extended (changed) by the adjacent width L10.

When the adjacent width L10 is changed, the inter-vehicle distance assistance for guiding the tractor 1 (vehicle body 3) to the next line L2c by automatic steering is different. As shown in fig. 1, the tractor 1 includes a first assist control unit 204 and a second assist control unit 205. The first auxiliary control unit 204 and the second auxiliary control unit 205 are constituted by an electric/electronic circuit provided in the second control device 60B, a program stored in a CPU or the like, and the like. The present invention is not limited to this, and the present invention may be applied to the first control device 60A and the third control device 60C.

As shown in fig. 15A, when the adjacent width L10 is not changed, the first assist control unit 204 automatically guides the vehicle body 3 to the line L2c1 next to the unchanged adjacent width L10 (straight portion SLn-1(n is 2 or more)) after the automatic steering is finished, separately from the automatic steering control unit 200. The first assist control unit 204 refers to the vehicle body position detected by the positioning device 40, and automatically changes the steering angle so that the vehicle body position approaches the next line L2c1, and matches the vehicle body position with the next line L2c 1.

As shown in fig. 15B, when the adjacent width L10 is changed, the second assist control unit 205 automatically guides the vehicle body 3 to the next line L2c2 on which the adjacent width L10 is changed (straight portion SLn (n is 2 or more)) separately from the automatic steering control unit 200 after the automatic steering ends. The second assist control unit 205 refers to the vehicle body position detected by the positioning device 40, and automatically changes the steering angle so that the vehicle body position approaches the next line L2c2, and matches the vehicle body position with the next line L2c 2.

In the above embodiment, the automatic steering when the tractor 1 (vehicle body 3) is moving forward was described, but the automatic steering can be performed when the tractor 1 (vehicle body 3) is moving backward. In the case of performing the backward automatic steering, first, the shuttle lever 91 disposed in the vicinity of the driver seat 10 is switched from the neutral position to the backward side, whereby the forward/backward switching unit 13 is switched to the backward side, and the driver performs the manual steering. Similarly to the forward movement, the automatic steering condition is adjusted so that the difference Δ F3 between the vehicle body orientation F1 and the line orientation F2 during the reverse movement is equal to or smaller than a predetermined value.

In the case of forward automatic steering, the driver performs manual steering while viewing the display device 45 provided in front of the driver's seat 10, so that the automatic steering conditions are fulfilled. On the other hand, in the case of the backward automatic steering, since the driver adjusts the automatic steering condition by manually steering while looking rearward, it is difficult to observe the display device 45 provided in front of the driver seat 10. Therefore, the tractor 1 includes a notification device 95 that notifies information related to automatic steering separately from the display device 45 disposed in front of the driver seat 10. The notification device 95 is constituted by a speaker that outputs sound (sound), a buzzer, a lamp that outputs light, an LED, and the like. The notification device 95 is provided around the driver's seat 10 in the case of a speaker or a buzzer, and is provided on the side or the rear of the driver's seat 10 in the case of a lamp or an LED.

The notification device 95 notifies whether or not the start condition of the automatic steering is fulfilled by sound or light when the automatic steering is in the reverse direction. For example, as shown in a section T1 in fig. 16, as the bearing difference Δ F3 becomes smaller, the interval between on (output)/off (stop) of the speaker, the buzzer, the lamp, and the LED is shortened. That is, as the bearing difference Δ F3 becomes smaller, the interval between the output sounds is shortened in the case of the speaker and the buzzer, and the interval between the lights is shortened in the case of the lamp and the LED. As shown in a section T2 in fig. 16, when the bearing difference Δ F3 is equal to or less than a predetermined value and the automatic steering condition is satisfied, the interval between the on/off states of the speaker, the buzzer, the lamp, and the LED is maintained. That is, as shown in the sections T1 and T2, the notification device 95 causes the sound or light pattern before the condition for automatic steering to be different from the sound or light pattern after the condition for automatic steering is completed. As shown in a section T3 of fig. 16, when the reverse automatic steering is started, the notification device 95 stops (turns off) the output.

As shown in fig. 18, a notification device 96 different from the notification device 95 may be provided at the rear portion of the tractor 1 (vehicle body 3) to notify the outside of the tractor 1 that it is automatically turned backward. Note that the notification device 95 and the notification device 96 may be used in combination. In the case of dual use, the notification device 95 does not stop the output.

The display device 45 displays a turn guide screen M2a for adjusting the start condition of the automatic steering when the automatic steering is performed forward, for example, when the shuttle lever 91 is switched to the forward side after the travel reference line L1 is registered. On the other hand, when the automatic steering is to be reversed, for example, when the shuttle lever 91 is switched to the reverse side after the travel reference line L1 is registered, the display device 45 displays at least a screen different from the turn guide screen M2a, for example, a driving screen M1 and a screen M5 urging the user to observe the rear side. In the screen M5, for example, since the automatic steering is backward, the screen is displayed with a view to the rear. In this way, when the driver is consciously faced not to the display device 45 but to the notification device 95 during the backward movement of the automatic steering, the operability of the backward movement of the automatic steering is improved.

The work vehicle 1 includes: a vehicle body 3, the vehicle body 3 being capable of traveling by either manual steering by a steering wheel 30 or automatic steering by the steering wheel 30; a reference registration unit 150 that registers a travel reference line L1 based on the position of the vehicle body 3 traveling by manual steering; a travel line setting unit 201 that enables the travel line setting unit 201 to set a plurality of planned travel lines L2 in automatic steering based on a travel reference line L1; and an automatic steering control unit 200 that controls automatic steering based on the line to travel L2, wherein the travel line setting unit 201 is capable of changing an adjacent width L10 of adjacent lines to travel L2 in the plurality of lines to travel L2. Thus, for example, in a situation where work is performed while performing automatic steering, the adjacent width L10 can be changed according to the work situation or the like. For example, when a path for causing another tractor (vehicle body) to travel within a field is required for prevention, a path or the like corresponding to a subsequent operation can be secured by increasing or decreasing the adjacent width L10 in accordance with the size of the other tractor. In addition, automatic steering can be performed in accordance with various situations, for example, when the ridge width needs to be partially changed.

The work vehicle 1 includes a change operation member 81 that instructs a change of the adjacent width L10, and the travel line setting unit 201 changes the adjacent width L10 when the change is instructed by the change operation member 81. Thus, the adjacent width L10 can be changed only when a change command is issued by the driver or the like via the change operation member 81.

The work vehicle 1 includes a calculation unit 202 that calculates the number of work pieces WTi that have performed the ground work, and the travel line setting unit 201 changes the adjacent width L10 based on a predetermined number of work pieces WTi calculated by the calculation unit 202. Thus, the adjacent width L10 can be automatically changed every time the number WTi of work pieces reaches a predetermined number.

The work vehicle 1 includes a display device 45, the display device 45 includes a reference input unit 75 that inputs a reference adjacent width L11 that is a reference adjacent width of the running lines L2 with respect to each other, and a change input unit 76 that inputs a changed adjacent width L12, and the running line setting unit 201 changes the adjacent width L10 based on the reference adjacent width L11 and the changed adjacent width L12. Thus, for example, the reference adjacent width L11 and the changed adjacent width L12 can be easily set, the automatic steering can be performed by the reference adjacent width L11, and the adjacent width L10 can be easily changed by changing the adjacent width L12 only when the adjacent width L10 needs to be changed.

The travel line setting unit 201 changes the value obtained by adding the changed adjacent width L12 to the reference adjacent width L11 to the adjacent width L10 when a change is instructed by the change operation member 81, and sets the reference adjacent width L11 to the adjacent width L10 when a change is not instructed by the change operation member 81. Thus, for example, the reference adjacent width L11 and the changed adjacent width L12 can be easily set, the automatic steering can be performed by the reference adjacent width L11, and the adjacent width L10 can be easily changed by changing the adjacent width L12 only when a change instruction is issued by the change operation member 81 by the driver or the like.

The travel route setting unit 201 changes the value obtained by adding the changed adjacent width L12 to the reference adjacent width L11 to the adjacent width L10 when the number of work pieces WTi calculated by the calculation unit 202 reaches a predetermined number, and sets the reference adjacent width L11 to the adjacent width L10 when the number of work pieces WTi does not reach the predetermined number. Thus, for example, the reference adjacent width L11 and the changed adjacent width L12 can be easily set, the automatic steering can be performed by the reference adjacent width L11, and the adjacent width L10 can be easily changed by automatically changing the adjacent width L12 each time the number WTi of the work pieces reaches the predetermined number.

The work vehicle 1 includes: a first assist control unit 204 configured to automatically guide the vehicle body 3 to the line L2 along which the adjacent width L10 is not changed after the automatic steering is completed when the adjacent width L10 is not changed; and a second assist control unit 205, in the case where the adjacent width L10 is changed, the second assist control unit 205 automatically guides the vehicle body 3 to the line L2 on which the adjacent width L10 is changed after the automatic steering is completed. This makes it possible to facilitate entry of work vehicle 1 not only into line L2 corresponding to reference adjacent width L11 but also into line L2 in which adjacent width L10 has been changed.

The work vehicle 1 includes: a vehicle body 3 capable of traveling; a connecting portion 8 provided in the vehicle body 3 and capable of connecting the working device; a display device 45 capable of displaying a plurality of setting screens M3, each of the plurality of setting screens M3 being used to input or display setting information including setting items 70a to 70h and setting values 71a to 71h related to settings of the vehicle body 3; and an input button 80 for inputting setting information and switching the plurality of setting screens M3 by the operation of the first operation and the second operation. Thus, setting information including the setting items 70a to 70h and the setting values 71a to 71h can be input only by two operations, i.e., the first operation and the second operation, and the setting screen M3 can be set. That is, the screen can be switched and set with the minimum number of buttons (input buttons 80), and the space for the input buttons and the like can be made compact while reducing the number of components.

The input button 80 is operable to perform a short press operation in which the press time of the first operation is short and a long press operation in which the press time of the second operation is longer than the first operation, and the display device 45 performs switching of the plurality of setting screens M3 when the long press operation is performed, performs movement of the cursor moved to a predetermined setting item among the plurality of setting items 70a to 70h when the short press operation is performed on the switched setting screen M3, and performs determination of the predetermined setting item when the cursor is in the setting item and the long press operation is performed. Thus, the switching of the plurality of setting screens M3 and the determination of the setting items 70a to 70h can be performed by a long press operation, and a predetermined setting item among the plurality of setting items 70a to 70h can be selected by a short press operation, but operability can be improved even if it is a single button.

The display device 45 can display a screen different from the setting screen M3, and the input button 80 can switch another screen when it is pressed for a short time. Accordingly, the screen other than the setting screen M3 on which the setting information is input can be switched by the short-press operation, and operability can be improved.

The display device 45 executes movement of the cursor K10 to a predetermined position among a plurality of digits of the set value when the short-press operation is performed on the setting screen (the detailed setting screen M3b2, the detailed setting screen M3b3) for setting the set value, determines the predetermined position when the long-press operation is performed when the cursor K10 is positioned at the predetermined position, and changes the numerical value of the predetermined position when the short-press operation is performed after the predetermined position is determined. Thus, when setting a set value having a plurality of digits, a predetermined digit among the plurality of digits can be determined by a long-press operation, and the predetermined digit and a numerical value can be changed by a short-press operation. That is, although it is a single button, the setting value composed of a plurality of bits can be set by the long press operation and the short press operation.

The vehicle body 3 can travel by either of the manual steering by the steering wheel 30 or the automatic steering by the steering wheel 30, and the display device 45 displays setting items 70a to 70h and setting values 71a to 71h related to the automatic steering as setting information. This makes it possible to easily confirm not only the setting items 70a to 70h and the setting values 71a to 71h relating to the automatic steering, but also the setting values 71a to 71h of the automatic steering by the input button 80.

The work vehicle 1 includes a reference registration unit 150, a travel line setting unit 201, and an automatic steering control unit 200. This allows the setting of the travel reference line L1, the setting of the line to travel L2, and the automatic steering to be performed easily.

The display device 45 displays a setting screen M3 on the setting screen M3, in which the adjacent width L10 of the adjacent lines L2 in the plurality of lines L2 is set to a set value. Thus, the setting screen M3 and the input buttons 80 can be combined to easily display and set the setting value of the adjacent width L10.

The work vehicle 1 includes: a vehicle body 3; a reference registration unit 150; an automatic steering control unit 200; a display device 45 that displays information related to automatic steering when the automatic steering is forward; and a notification device 95 that notifies information relating to automatic steering separately from the display device 45 when the automatic steering is reverse. Thus, the driver can confirm the information on the automatic steering while viewing the display device 45 when performing the forward automatic steering, and can confirm the information on the automatic steering by the notification device 95 without viewing the display device 45 when performing the backward automatic steering.

The work vehicle 1 includes a steering changeover switch 52 that changes over the start or end of the automatic steering, and the display device 45 displays a guidance screen (a turning guidance screen M2a) for adjusting the start condition of the automatic steering when the automatic steering is forward after the automatic steering is ended, and the notification device 95 notifies whether the start condition of the automatic steering is ready or not by sound or light when the automatic steering is reverse. Thus, in the case of performing automatic steering for forward traveling, the driver can adjust the start condition of automatic steering while viewing the guide screen (the turn guide screen M2a), and in the case of performing automatic steering for backward traveling, the driver can adjust the start condition of automatic steering by sound or light.

The display device 45 displays the state in which the start condition of the automatic steering is ready on the guide screen (the turn guide screen M2a) based on the azimuth difference Δ F3 between the azimuth of the travel reference line L1 and the azimuth of the vehicle body 3. Thus, when performing the forward automatic steering, the driver can easily check the situation of the bearing difference Δ F3 between the bearing of the travel reference line L1 and the bearing of the vehicle body 3 by viewing the guide screen (the turn guide screen M2 a).

The notification device 95 notifies whether or not the automatic steering start condition is satisfied by changing the sound or light pattern based on the azimuth difference Δ F3 between the azimuth of the travel reference line L1 and the azimuth of the vehicle body 3. Thus, in the case of performing the automatic steering for rearward movement, the driver can easily confirm the state of the bearing difference Δ F3 by voice or light.

The display device 45 displays a screen different from at least the guidance screen (the turn guidance screen M2a) when the automatic steering is the reverse direction. Thus, when the driver adjusts the conditions for starting the backward automatic steering, the driver can be prevented from viewing the forward guidance screen (the turn guidance screen M2 a).

The display device 45 displays a screen M5 urging observation to the rear when the automatic steering is reverse. Thus, when the driver adjusts the conditions for starting the backward automatic steering, the driver can be reminded (urged) to pay attention to the backward direction, and the backward automatic steering can be smoothly performed.

The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the claims rather than the description above, and is intended to include meanings equivalent to the claims and all modifications within the scope.

In the above embodiment, the adjacent extension width is set as the changed adjacent width L12, and the travel line setting unit 201 changes the value obtained by adding the changed adjacent width L12 to the reference adjacent width L11 to the adjacent width L10 when the change is instructed by the change operation member 81, but a predetermined adjacent width may be set as the changed adjacent width L12, and the travel line setting unit 201 may change the value of the changed adjacent width L12 to the adjacent width L10 when the change is instructed by the change operation member 81.

Description of the reference numerals

1: work vehicle (tractor)

3: vehicle body

30: steering wheel

45: display device

46: control unit

52: steering change-over switch

95: notification device

96: notification device

150: reference registration unit

200: automatic steering control unit

L1: reference line of travel

L2: predetermined line of travel

M2: guide picture

Δ F3: azimuth difference

Claims

1. A work vehicle, comprising:

a vehicle body that can travel by either of manual steering by a steering wheel and automatic steering by the steering wheel;

a reference registration unit that registers a travel reference line based on a position of a vehicle body that travels by the manual steering;

an automatic steering control unit that controls the automatic steering on a travel target line set based on the travel reference line;

a display device that displays information related to the automatic steering when the automatic steering is forward; and

and a notification device that notifies information relating to the automatic steering separately from the display device when the automatic steering is in reverse.

2. The work vehicle according to claim 1,

the work vehicle is provided with a steering changeover switch for changing over the start or end of the automatic steering,

the display device displays a guide screen for adjusting a start condition of the automatic steering when the automatic steering is forward after the automatic steering is ended,

the notification device notifies whether or not the starting condition of the automatic steering is fulfilled by sound or light when the automatic steering is in a reverse direction.

3. The work vehicle according to claim 2,

4. The work vehicle according to claim 2,

5. The work vehicle according to claim 2,

6. The work vehicle according to any one of claims 2 to 5,